Transpile ESM import

[rtritto]

Steps to reproduce

• yarn init -y
• yarn set version canary
• yarn add devalue ts-import typescript (devalue is an ESM)
• Create test.ts file

import 'devalue'

• Create start.js file

const { loadSync } = require('ts-import')
loadSync('./test.ts')

• yarn node start.js
  output:

C:\test-esm\.pnp.cjs:5645
        Error.captureStackTrace(err);
              ^

Error: require() of ES Module C:\Users\<USER>\AppData\Local\Yarn\Berry\cache\devalue-npm-4.2.3-7b5bd84f96-9.zip\node_modules\devalue\index.js from C:\test-esm\.cache\ts-import\C\test-esm\test.js not supported.
Instead change the require of index.js in C:\test-esm\.cache\ts-import\C\test-esm\test.js to a dynamic import() which is available in all CommonJS modules.
    at Object.require$$0.Module._extensions..js (C:\test-esm\.pnp.cjs:5645:15)
    at Module.load (node:internal/modules/cjs/loader:1004:32)
    at Function.require$$0.Module._load (C:\test-esm\.pnp.cjs:5487:14)
    at Module.require (node:internal/modules/cjs/loader:1028:19)
    at require (node:internal/modules/cjs/helpers:102:18)
    at Object.<anonymous> (C:\test-esm\.cache\ts-import\C\test-esm\test.js:3:1)
    at Module._compile (node:internal/modules/cjs/loader:1126:14)
    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1180:10)
    at Object.require$$0.Module._extensions..js (C:\test-esm\.pnp.cjs:5649:33)
    at Module.load (node:internal/modules/cjs/loader:1004:32) {
  code: 'ERR_REQUIRE_ESM'
}

[rtritto]

Related: microsoft/TypeScript#43329

Possible related/workaround (to check): @brillout/import

[yunsii]

Any progress?

[rtritto]

I think no, some help is needed

[radarsu]

I'll be looking into that.

[radarsu]

For ESM packages I've released 5.0.0-beta.0 version - fully updated to ESM. My test suite is passing, but it isn't yet battle-tested so use with caution.

[rtritto]

@radarsu same error with [email protected].

start.js:

const { load } = require('ts-import')
load('./test.ts')